Treatment with simethicone (Espumisan®, 100 mg/ml, Berlin-Chemie / Menarini Polska Sp z o.o., Warsaw, Poland) for four weeks. Simethicone was administered 3-6 times per day with each treatment comprising 6 drops of the 100 mg/ml emulsion.

Treatment with one stick pack of the multi-strain synbiotic (Multilac® Baby, Vivatrex GmbH, Aachen, Germany) per day for four weeks. Each stick pack of Multilac® Baby contains a total of 10^9 colony forming units (CFU) with equal CFU amounts of the following probiotic bacteria: L. acidophilus LA-14, L. casei R0215; L. paracasei Lpc-3; L. plantarum Lp-115; L. rhamnosus GG, L. salivarius Ls-33, B. lactis Bl-04, B. bifidum R0071, B. longum R0175 and 1.43 g of the prebiotic fructooligosaccharides.

Oral daily treatment for four weeks

Measurement of days of crying during last three weeks before enrollment and before the end of treatment. Treatment success will be determined by calculation the percentage of patients for whom the measurement will be reduced by the respective treatment by equal or more than 50 percent, compared to the value at the time of enrollment.

Measurement of average duration of evening crying during last three weeks before enrollment and before the end of treatment. Treatment success will be determined by calculation the percentage of patients for whom the measurement will be reduced by the respective treatment by equal or more than 50 percent, compared to the value at the time of enrollment.

BÜHLMANN Quantum Blue® Calprotectin High Range (Schönenbuch, Switzerland). It is a quantitative determination of fecal calprotectin through a sandwich immunoassay. Treatment success will be determined by calculation the percentage of patients for whom the measurement will be reduced by the respective treatment by equal or more than 50 percent, compared to the value at the time of enrollment.